﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication5
{
	class Program
	{
		static void Main(string[] args)
		{
			string s = "Hello";
			StringBuilder sb = new StringBuilder(s);
			for (int i = 0, int j = s.Length-1; i< s.Length / 2; i++,j--)
			{
				char ch = s[i];
				sb[i] = sb[j];
				sb[j] = ch;
			};
			Console.WriteLine(R);
			Console.ReadLine();
		}
	}
}
